My friend is having the same problem. The framerate is reeeeeally low and he has a quad core processor with 3 gigs of ram. And i saw a video of someone playing guitar hero smoothly on their's. My friend supposidly tried every setting he could be i have a feeling he was forgetting something, so i'll try to fiddle with it to see if i can get it to work. If i do i'll let u know how to do it agent 007.